Topping the list of changes is a more powerful and (surprisingly) more fuel-efficient version of Maserati’s all-alloy 4.7-liter V-8, coupled with a ZF six-speed automatic transmission. Peak output from the naturally aspirated mill is 450 horsepower and 376 pound-feet of torque.

Highlights of the drivetrain package is Maserati’s Friction Reduction Program, which has made the GranTurismo Convertible Sport’s engine more reactive to driver inputs, while reaching a 6 percent reduction in fuel consumption. The top speed comes in at 177 mph.

This six-speed transmission is equipped with the super-fast MC Auto Shift software and has been developed for the GranTurismo Convertible Sport directly from the transmission in the Quattroporte Sport GT S. The MC Auto Shift provides optimized gearshift response resulting in better gear engagement.

The handling has received attention, too, with an upgrade and revision of the Skyhook active-suspension system--now with a sportier tuning--and the adoption of grooved and drilled dual-cast brake discs.

Visually, the GranTurismo Convertible Sport is characterized by a distinctive nose with a black grille and a Trident with red accents. The headlights now have a black look with white sidemarks, while front corner splitters and the redesigned side-skirts are both body colored. The car also debuts a new body color for Maserati: Rosso Trionfale, which was inspired by the red Italian national colors used on 1950s racing Maseratis.

The 2012 Maserati GranTurismo Convertible Sport will go on sale this summer. The 2011 Geneva Motor Show, meanwhile, kicks off on March 1. Follow our complete coverage of the event by clicking here.